将log4j2配置文件配置为仅将错误记录到文件中

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
    <Appenders>
        <File name="errorFile" fileName="error.log">
            <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
            <Filters>
                <ThresholdFilter level="ERROR" onMatch="ACCEPT" onMismatch="DENY" />
            </Filters>
        </File>
    </Appenders>
    <Loggers>
        <Root level="ERROR">
            <AppenderRef ref="errorFile" />
        </Root>
    </Loggers>
</Configuration>

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

public class MyClass {
    private static final Logger logger = LogManager.getLogger(MyClass.class);

    public void doSomething() {
        try {
            // 业务逻辑
        } catch (Exception e) {
            logger.error("发生错误", e);
        }
    }
}